env_filter is used at run time in 1,681 crates (of which 151 optionally). It is a direct run-time dependency in 9 crates. It's used at build time in 30 crates (of which 2 optionally, ). It's used only as a dev dependency in 779 crates.

Depender (with downloads and own rev deps) env_filter version
8.0M 7856 env_logger ^0.1.0
341K 50 android_logger ^0.1
10K 2 logforth ^0.1
3.4K hilog ^0.1.0
850 hitdns ^0.1.0
300 krossbar-logger ^0.1
220 1 gelf_logger ^0.1.0
120 krossbar-log-viewer ^0.1
krossbar-log-control ^0.1